The steps outline how to add, remove, and modify users on either the Ubuntu or Debian operating systems.
Initial requirements for a Debian system
The majority of the commands in this manual call for superuser rights. Using the sudo command may result in the following error:
bash: sudo: command not found
Superuser mode must be enabled, sudo must be installed, and your user must be added to the sudo group:
su –
apt-get install sudo -y
usermod -aG sudo yourusername
How to add a new user?
Useradd and adduser are two command line utilities available in Ubuntu and Debian that you can use to establish a new user account.
Adduser is a user-friendly, interactive Perl interface for useradd, a low-level application for adding new users.
Run the following command to use the adduser command to establish a brand-new operating system user account with the name username:
sudo adduser username
As a result, a dialog will appear in which you need to enter a password and additional information:
Adding user `username’ …
Adding new group `username’ (1000) …
Adding new user `username’ (1000) with group `username’ …
Creating home directory `/home/username’ …
Copying files from `/etc/skel’ …
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for username
Enter the new value, or press ENTER for the default
Full Name []: Name
Room Number []: 100
Work Phone []: 123-45-45
Home Phone []:
Other []:
Is the information correct? [Y/n] Y
The command creates a home directory for the new user and copies files from the /etc/skel directory there.
By default, members of the sudo group are granted sudo access.
If you want the newly created user to have administrator rights, add it to the sudo group:
sudo usermod -aG sudo username
How to delete a user?
There are two command line tools that can be used to delete a user account: userdel and deluser. We recommend using the deluser command as it is friendlier than the low-level userdel command.
To delete a user without deleting the user’s files and directories, run:
sudo deluser username
If you want to remove the user’s home directory and its contents, use the –remove-home flag:
sudo deluser –remove-home username
This will result in the following message:
Looking for files to backup/remove …
Removing files …
Removing user `username’ …
Warning: group `username’ has no more members.
Done.
How to change user password?
To change your own password, use the passwd command with no additional arguments:
passwd
In the system dialog, you will need to enter the old password and specify the new one:
Changing password for username.
(current) UNIX password:
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
To change the password for another user, you need administrator rights and a username:
sudo password username
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